An enchanting tale of magic, friendship and adventure for readers aged 9 and up - from bestselling author, Holly Webb. Olivia is the princess of Venice. So when the waters start to rise, she knows only her magic can prevent disaster befalling the city.

Desperate for help, and for a friend, Olivia discovers something incredible: a water horse, hidden in the canals of the city. Invisible to most, Lucian knows the deepest secrets of the sea - secrets that could hold the key to saving the city. But can their friendship overcome those plotting against Olivia, and against Venice itself?